#sentinel

Live, measured metrics for the hashtag #sentinel from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.

hashtag.org network · sponsored

Own #sentinel

This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.

$110.68/ year · 8-character #name
Claim #sentinel — $110.68/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
5
Uses / 7 days
Mastodon
5
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 40
1.5
Avg reactions / post
Mastodon · last 40
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · fosstodon.org (Mastodon public tags API) · fetched 2026-10-25 09:06 UTC
1
10-19
2
10-20
1
10-21
0
10-22
0
10-23
1
10-24
0
10-25

5 uses by 5 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · fosstodon.org (Mastodon public search API) · fetched 2026-10-25 09:06 UTC
#sentinel2
1 uses · 1 accounts / 7d
#sentinel3
2 uses · 2 accounts / 7d
#sentinel3c
0 uses · 0 accounts / 7d
#sentinelai
0 uses · 0 accounts / 7d
#sentinel5
0 uses · 0 accounts / 7d
#sentinelle
4 uses · 3 accounts / 7d
#sentinels
0 uses · 0 accounts / 7d
#sentinelrestaurants
2 uses · 2 accounts / 7d
#sentinelone
0 uses · 0 accounts / 7d
#sentinelenvelope
0 uses · 0 accounts / 7d
#MilwaukeeJournalSentinel
0 uses · 0 accounts / 7d
#SouthFloridaSunSentinel
0 uses · 0 accounts / 7d

Live pulse

measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-10-25 09:06 UTC

Everything below is measured over the latest 40 public posts (spanning ~1614 hours).

Posting hours (UTC) — busiest: 15:00

00:0012:0023:00

Languages: English (22) · French (9) · Indonesian (3) · German (2) · Hungarian (1) · Basque (1)

Avg boosts / post: 1.5

Top of the latest posts

  • Doing a presentation tomorrow on our utter dependence on US technology and specifically how we 100% picked US tools/support for cybersecurity as well. We are SO fucking fucked. #sentinel

    bert hubert 🇺🇦🇪🇺🇺🇦@[email protected]♥ 48↻ 342026-08-19 10:10 UTCView post →

  • #CyberCon, one of the top Czech #security conferences, just started. Visit our booth and find out, what we have for you. https://www.cybercon.cz/ #Turris #Sentinel #conference

    Turris project@turris♥ 7↻ 42026-09-09 09:36 UTCView post →

  • Kalimantan still has fires, thick smokes, and areas with high carbon monoxide (CO) concentration. ⚠ Here are true colour (RGB), aerosol index (AI), and carbon monoxide (CO) concentration images of Kalimantan using mosaic since 11 September

    Muhammad Rifqi Priyo Susanto@[email protected]♥ 3↻ 52026-09-16 00:16 UTCView post →

What “sentinel” means

Wiktionary

sentinel/ˈsɛntɪnəl/

  • nounA sentry, watch, or guard.
  • verbTo watch over as a guard.
Full entry on Wiktionary →

#sentinel across platforms

every network with a public tag surface

Follow #sentinel straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.

X (Twitter) ↗Instagram ↗TikTok ↗Facebook ↗LinkedIn ↗YouTube ↗Threads ↗Bluesky ↗Mastodon ↗Reddit ↗Pinterest ↗Tumblr ↗

Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/sentinel